SEC Insider Transactions from Flanagan W. Michael.

Last updated: 2026-03-14 11:56 UTC | Total transactions: 54

Flanagan W. Michael, Chief Scientific Officer at Avidity Biosciences, Inc. ($RNAM), sold shares on the open market six times over the past year, totaling $2.4 million. His most recent sale occurred on January 21, 2026. These sales rank 3,091st among 11,678 individual insiders in our database, where the average is $8.6 million across about 6.4 transactions. He made no open market purchases during this period.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Feb. 27, 2026 Atrium Therapeutics, Inc. $RNA Flanagan W. Michael Not found A Stock Option (Right to Buy) 20000 $0.00 20,000.0000 0 9999.99% 0.00%
Feb. 27, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer D Stock Option (Right to Buy) 72000 $0.00 0.0000 150,675,742 100.00% 0.05%
Feb. 27, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer D Stock Option (Right to Buy) 50000 $0.00 0.0000 150,675,742 100.00% 0.03%
Feb. 27, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer D Stock Option (Right to Buy) 88000 $0.00 0.0000 150,675,742 100.00% 0.06%
Feb. 27, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer D Stock Option (Right to Buy) 96000 $0.00 0.0000 150,675,742 100.00% 0.06%
Feb. 27, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer D Common Stock 150365 $0.00 0.0000 150,675,742 100.00% 0.10%
Feb. 27, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer D Stock Option (Right to Buy) 25000 $0.00 0.0000 150,675,742 100.00% 0.02%
Feb. 27, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer D Stock Option (Right to Buy) 66500 $0.00 0.0000 150,675,742 100.00% 0.04%
Jan. 21, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 3976 $72.45 87,651.0000 150,675,742 4.34% 0.00%
Jan. 21, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 2558 $72.45 85,093.0000 150,675,742 2.92% 0.00%
Jan. 7, 2026 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 2373 $72.23 91,627.0000 150,675,742 2.52% 0.00%
Dec. 17, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer A Common Stock 27500 $0.00 107,695.0000 150,675,742 34.29% 0.02%
Dec. 17, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer F Common Stock 13695 $71.87 94,000.0000 150,675,742 12.72% 0.01%
Sept. 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer M Common Stock 20000 $14.22 100,195.0000 120,212,301 24.94% 0.02%
Sept. 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 20000 $38.94 80,195.0000 120,212,301 19.96% 0.02%
Sept. 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer M Stock Option (Right to Buy) 20000 $0.00 76,500.0000 120,212,301 20.73% 0.02%
June 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer M Stock Option (Right to Buy) 20000 $0.00 96,500.0000 120,212,301 17.17% 0.02%
June 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer M Common Stock 20000 $14.22 100,195.0000 120,212,301 24.94% 0.02%
June 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 20000 $32.88 80,195.0000 120,212,301 19.96% 0.02%
March 20, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 11780 $31.06 80,195.0000 120,212,301 12.81% 0.01%
March 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer M Stock Option (Right to Buy) 20000 $0.00 116,500.0000 120,212,301 14.65% 0.02%
March 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer M Common Stock 20000 $14.22 111,975.0000 120,212,301 21.75% 0.02%
March 11, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 20000 $30.13 91,975.0000 120,212,301 17.86% 0.02%
Jan. 21, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 1812 $28.59 91,975.0000 0 1.93% 0.00%
Jan. 21, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer S Common Stock 3860 $28.60 93,787.0000 0 3.95% 0.00%
Jan. 6, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer A Common Stock 25000 $0.00 97,647.0000 0 34.41% 0.00%
Jan. 6, 2025 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Scientific Officer A Stock Option (Right to Buy) 50000 $0.00 50,000.0000 0 9999.99% 0.00%
Dec. 18, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 12742 $32.66 72,647.0000 0 14.92% 0.00%
Dec. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 24000 $35.77 85,389.0000 0 21.94% 0.00%
Dec. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Stock Option (Right to Buy) 24000 $0.00 86,000.0000 0 21.82% 0.00%
Dec. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Common Stock 24000 $22.47 109,389.0000 0 28.11% 0.00%
Oct. 1, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Common Stock 62500 $26.75 147,889.0000 0 73.19% 0.00%
Oct. 1, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Stock Option (Right to Buy) 62500 $0.00 25,000.0000 0 71.43% 0.00%
Oct. 1, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 62500 $47.62 85,389.0000 0 42.26% 0.00%
Sept. 23, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 11847 $43.89 85,389.0000 0 12.18% 0.00%
Sept. 19, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO A Common Stock 25000 $0.00 97,718.0000 0 34.38% 0.00%
Sept. 19, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO A Common Stock 25000 $0.00 85,871.0000 0 41.07% 0.00%
Sept. 23, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 13153 $44.00 72,718.0000 0 15.32% 0.00%
Sept. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 62500 $40.40 75,765.0000 0 45.20% 0.00%
Sept. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Common Stock 34000 $22.47 109,765.0000 0 44.88% 0.00%
Sept. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 34000 $40.40 75,765.0000 0 30.98% 0.00%
Sept. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 14894 $40.40 60,871.0000 0 19.66% 0.00%
Sept. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Stock Option (Right to Buy) 62500 $0.00 87,500.0000 0 41.67% 0.00%
Sept. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Stock Option (Right to Buy) 34000 $0.00 110,000.0000 0 23.61% 0.00%
Sept. 11, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO M Common Stock 62500 $26.75 138,265.0000 0 82.49% 0.00%
June 17, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO A Common Stock 25000 $0.00 60,871.0000 0 69.69% 0.00%
June 17, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO A Common Stock 25000 $0.00 75,765.0000 0 49.25% 0.00%
June 18, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 10106 $39.13 50,765.0000 0 16.60% 0.00%
Jan. 22, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO S Common Stock 4129 $10.13 35,871.0000 0 10.32% 0.00%
Jan. 20, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO A Stock Option (Right to Buy) 88000 $0.00 88,000.0000 0 9999.99% 0.00%
Jan. 20, 2024 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO A Common Stock 20000 $0.00 20,290.0000 0 6896.55% 0.00%
Sept. 11, 2023 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael CSTO A Stock Option (Right to Buy) 72000 $0.00 72,000.0000 0 9999.99% 0.00%
Jan. 20, 2023 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Technical Officer A Stock Option (Right to Buy) 144000 $0.00 144,000.0000 0 9999.99% 0.00%
Jan. 20, 2023 Avidity Biosciences, Inc. $RNAM Flanagan W. Michael Chief Technical Officer A Common Stock 40000 $0.00 40,290.0000 0 9999.99% 0.00%